john has more on north korea now. jon: gordan chang is a frequent guest of ours the author of "nuclear showdown north korea takes on the world." were you as surprised as the rest of the world seemed to be when they got the missile off the launch pad. >> i was stunned. this is a really important engineering feat. they did it under extremely difficult circumstances within a very tight timetable. although they do have the ability to do this on their own we nonetheless have to ask the question, did they have help if if they had help it probably was china johnston china supposedly stpresed regre expressed regret that they had gone through with this. >> they might have had a lot of influence and they could help stop it if they stopped the aid and fuel and all the rest of it. at the top of the north korean leadership there is turmoil. kim jong un wanted a real success to mark his first year in office. jon: by launching this missile does he get that credibility with the military this he's been looking for? >> i think that he